You can try to find at eprint.iacr.org/ which is a cryptography site. I hope this information helps you.

If you want to protect the traffic between two P2P-nodes, then merely rely on a topical proved as secure hybrid cryptographical suite, such as TLS.

u can SSL over socket

What is the protocol used (UDP or TCP)

Mousa, I suggest that you also consult http://scholar.google.com!

you can try to fix the Diffie–Hellman key exchange protocol vulnerability

P2P is always tricky as SSL and other technologies might prove to be not fit for the task. May I offer you to have a look at "Trust in Peer-to-Peer content distribution protocols" by Kuntze, Rudolph and Fuchs as well as "Reliable Identities using off-the-shelf hardware security in MANETs" by Kuntze and Rudolph. I have also some more publications on the MANET topic and also BitTorrent extension. Let me know if that is a direction fit for you.

the choice you gonna do, will depend on several criteria:

- Authentication is required between nodes or not?

- Your P2P is synchronous or asynchronous

- Computational capacity of nodes,

- Real-time aspects exist or is not important

etc ...

clearly defining what it takes, the choice becomes easier

Thanks all

Please refer the following link.

http://www.cse.wustl.edu/~jain/cse571-07/ftp/p2p/

This link may help you.

Dear Farajallah 

the most link to start with your problem is :

http://www.cs.umd.edu/projects/p2prg/p2p-overview.pdf

Dear Mousa,

the question here is what's your aim. There are various ideas on P2P networks out there with very different purposes. What kind of P2P network do you address? Is it more in the direction of BitTorrent (content distribution) or BATMAN (ad-hoc networks)? Do you have control, owner or are even the administrator of the devices used? To answer your question it would be good to know more of your use case first.

Cheers

read on the current state of the arts under the topic of post quantum cryptography

You can have a look to the following publication. This is a particular case about certification, but you may find useful ideas.

Conference Paper A Scalable Architecture for Highly Reliable Certification